Pelvis and Perineum Flashcards

1
Q

What is the pelvic outlet?

A

The inferior opening of the pelvis

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2
Q

What is the true pelvis formed by?

A
Pubis 
Ischium
Coccyx
Sacrum 
(PICS)
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3
Q

What is the false pelvis?

A

Lumbar vertebrae
Iliac Fossa
Abdominal wall

(LIA(R))

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4
Q

What type of joint is the sacroiliac joint?

A

Synovial plane joint

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5
Q

What type of joint is the pubic symphysis?

A

Secondary cartilaginous joint

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6
Q

How is the female greater pelvis described

A

Large and Broad

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7
Q

How is the male greater pelvis described?

A

Small and Narrow

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8
Q

How is the female pelvic inlet described?

A

Wide and Oval

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9
Q

How is the male pelvic inlet described?

A

Narrow and heart shaped

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10
Q

How is the female pelvic outlet described?

A

Wide

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11
Q

How is the male pelvic outlet described?

A

Narrow

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12
Q

What is the female suprapubic angle?

A

Obtuse

Greater than 90 degrees

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13
Q

What is the male suprapubic angle?

A

Acute

Less than 90 degress

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14
Q

What shape is the female obturator foramen?

A

Oval shaped

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15
Q

What shape is the male obturator foramen?

A

Rounded

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16
Q

Is the female acetabulum large or small?

A

Small

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17
Q

Is the male acetabulum large or small?

A

Large

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18
Q

What is the narrowest diameter of the pelvic inlet?

A

12cm

Anteroposterior

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19
Q

What is the narrowest diameter of pelvic outlet

A

11cm

Transverse

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20
Q

How is the female lesser pelvis described?

A

Flexible

Straight

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21
Q

How is the male lesser pelvis described?

A

Coccyx projects in and is immovable

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22
Q

What walls does the pelvic cavity have?

A

Antero-inferior
2 lateral walls
Posterior wall

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23
Q

What is the anterior-inferior formed by?

A

The bodies and the rami of the pubic bones

The pubic symphysis

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24
Q

What is the perineal body?

A

Central tendon of the perineum

An irregular fibromuscular mass

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25
Where is the perineal body located?
At the junction of the urogenital and anal triangles | the central point of the perineum
26
What does the perineal mass act as in women?
A tear resistant body between the vagina and the external anal sphincter
27
Where does the perineal body lie in the male?
Between the bulb of the penis and the anus
28
What is the anococcygeal body?
The muscle and fibrous tissue between the coccyx and anus
29
What 2 muscles make up the majority of the pelvic floor?
Levator ani | Coccygeus
30
Which pelvic floor muscle has 3 separate paired muscles?
Levator ani
31
List 2 functions of the pelvic floor?
Support the abdominopelvic viscera | Resistance to increases in inta-pelvic/abdominal pressure
32
What is the innervation of the pelvic floor?
Pudendal nerve
33
What is the pudendal nerve?
S2-S4
34
What is cystocele?
A condition where the bladder bulges into the vagina | Weakening of the wall between the bladder and vagina
35
What does cystocele cause?
Frequent urination | Pain during sexual intercourse
36
What is rectocele?
Wall which separates the rectum from the vagina is weakened | Vaginal wall bulges
37
What injury to the pelvic floor during childbirth is common and potentially damaging?
Anal continence
38
What are the main pelvic viscera (organs) in the female?
Bladder Bowel Uterus
39
What are the main pelvic viscera (organs) in a man?
Bladder | Bowel
40
Branches of which arteries distribute blood to most of the pelvic organs?
Left and right internal iliac arteries
41
What is the function of the pelvic floor?
Separates the pelvic cavity and the perineum | Attaches the walls of the lesser pelvis
42
What are the gaps in the pelvic floor called?
Urogenital hiatus | Rectus hiatus
43
Where is the perineal body situated?
Between the rectus hiatus and the urogenital hiatus
44
Which venous plexus does prostatic venous plexus communicate with on the posterior side?
Internal Vertebral Venous plexus
45
Which somatic nerves supply the pelvis organs?
Ilioinguinal nerve Genitofemoral nerve Pudendal nerve
46
From which vertebral level does the ilioinguinal nerve originate?
L1
47
Where does the ilioinguinal nerve enter the inguinal canal?
At the superficial inguinal ring
48
What does the ilioinguinal nerve supply in the male?
The skin at the root of the penis
49
What does the ilioinguinal nerve supply in the female?
The skin of the labia
50
At which vertebral level does the genitofemoral nerve originate?
L1-L2
51
Where does the genitofemoral nerve enter the inguinal canal?
At the deep inguinal ring
52
What does the genital branch of the genitofemoral nerve supply?
Cremaster muscle | Anterior scrotal skin
53
What does the pudendal nerve arise from?
The sacral plexus
54
What does the pudendal nerve follow the course of?
The pudendal artery
55
What does the pudendal nerve innervate?
The skin and muscles of the perineum
56
Which segmental levels does the pudendal nerve arise?
S2-S4
57
What bony landmarks are used when performing a pudendal nerve block during labour?
Ischial spine
58
What does the autonomic nerve supply to the pelvis originate from?
The Pelvic Plexus
59
What is another term for the pelvic plexus?
Inferior hypogastric
60
What do the sympathetic fibres of the autonomic system originate from?
L1 and L2 via the hypogastric nerve and terminal aspect of the sympathetic trunk
61
What do the sympathetic fibres of the autonomic system supply?
Sympathetic supply to all the internal pelvic organs
62
What do the sympathetic fibres of the autonomic system supply in the male?
Vas deferens Seminal vesicles Prostate Epididymis
63
What do the sympathetic fibres of the autonomic system supply in the female?
Ovaries Uterus Fallopian tubes Vagina
64
Where do the parasympathetic fibres of the autonomic system originate from?
Pelvic splanchnic nerve (S2-S4)
65
What do the parasympathetic fibres of the autonomic system supply in the males and females?
Erectile tissue
66
What do the external iliac nodes drain?
``` Bladder Prostate Urethra Cervix Upper part of vagina ```
67
What do the internal iliac nodes drain?
Gluteal region Deep perineum Inferior pelvic viscera
68
What do the sacral lymph nodes drain?
Rectum | Posterior pelvis
69
What do the common iliac nodes drain?
External iliac nodes Internal iliac nodes Sacral lymph nodes